Ments



(N6 Model.)

J. A. HAGAN.

V GAR WEL-JEL. Y N0. 294,995. Patented Mal. v1]., 1884.

II'Y.

Afl

UNiTE STATES JOHN n. HAGAMoE THREE RIVERS, MioH., AsSicNoR, RY MEsNEASSIGN- MENTS, To THE HAGAN STEEL cAR WHEEL coMRANHoF SAME PLAGE.

CAR-WHEEL.

SPECIFICATION formingpart of Letters Patent No. 294,995, dated March11,1884.

v pplication filed August Q1, 1893. (No model.)

'To all wiz/0112, t nea/y concern.-

BeA it known that I, JOI-IN A. HAGAN, of Three Rivers, in the county ofSt. Joseph and State of Michigan, have invented certain new and'usefnllImprovements in Car-Vheels, 'of which the following is a specification,reference being had to the accompanying drawings, in which- Figure l isa radial or diametrical Section of my improved car-wheel, and Fig. 2 isa side elevation of the same, partly in section.

My invention relates to that class of carwheels in which the tire andbody of the wheel are of different materials; and has for its objects,iirst, securely attaching the tire tothe wheel-body in a convenient andinexpensive manner, second, constructing the wheel so that it will be toa proper extent' elastic in use; and, third, providing` for theexpansionof the axle and hub (caused by hot journals) without causing adangerous strain on the wheel-body or tire. I

For the purpose of securely attaching the tire to the body ofthe wheel,the tire is made with an internal ilange or ring, which method ofconstruction, I am aware, is not broadly new 5 but when this internalring is made integral with the tire its cost is greatly increased onaccount ofthe difficulty of hammering or rolling1 to the required shape.Again, when it is made of a separate continuous piece, the difficultyand cost of construction and union with the tire are very considerable,and the result is not satisfactory. Therefore I make my internal ring incurved sections, and dovetail it and key it into an annular groove inthe inner face of the tire, which I find is an improvement of greatpractical importance. In my improved wheel the only increased cost overa plain tire is for the internal ring as a Separate structure, and forthel dovetail annular groove in the tire in which it is held, and thevery trifling cost-of securing the ring into the groove in the tire. Inpoint of safety the sectional ring is greatly superior to the solid ringor flange, because steel tires almost invariably fracture laterally, andthe break is liable to extend through the depending ring also. Vith thebuilt-up sectional ring this cannot occur.,

and the fractured piece will be held securely byits fitting the dovetailring. rIhe required elasticity and provision for expansion of the vaxleand hub are obtained by the shape and material of the side plates ordisks which form the body of the wheel.

My improved wheel consists of a hub, A, preferably of wrought-iron,having an annular projection, B, forming shoulders for the reception ofthe side plates C and D. The hub may, however, be of malleable castiron,or of steel, or other metal. The side plates are preferably ofsheet-iron of suitable thickness, or of steel. The forms or contours ofthe side plates may be varied; but I prefer the forms shown. They aresimilar circular disks with flanged rims, and, viewed from the exteriorof the wh eel, raised central portions, substantially as illustrated.

E indicates the tire, which is preferably of steel, and has an annulardovetail groove, F, in its inner face, from which projects inwardly asuitable distance a safety-ring, G. This ring is preferably ofwrought-iron in sections or segments, and made to iit tightly into thedovetail groove of the tire. It is composed of two sectional sidepieces, g, with dovetail finish, as illustrated, so as to t the dovetailofthe tire, and a sectional center piece or key, g2, which serves tohold them firmly in place. In building up this ring in place in thetire, the sections should be made to break joints.

I-I indicates bolts or rivets passing throughthe side plates and thering, and I I` bolts or rivets passing through the side plates and theannular projection of the hub.

' The manner of manufacturing my improved car-wheel is as follows: Thehub and tire are formed by forging or casting in any usual manner, andthe dovetail groove n the inner face of the tire is turned or otherwiseformed,

vand the remaining portion of the inner surface of the tire is also madetrue by turning or otherwise. The ring is then formed in the dovetail.groove of the tire of suitable pieces,which have preferably been rolledto the required section and bent to the required circle, the

holes for the bolts being either punched or drilled. The ci rcnlarpieces forming the sides AIO of the ring, not having their ends weldedor otherwise joined in the groove of the tire, but merely being incontaet, may be inserted in place by overlapping their endssufficiently, and then springing the circular pieces into place in thedovetail groove in the tire. The central piece or key is then afterwardput in in a similar manner, which forces the side pieces to iit snuglyin the dovetail portions of the groove. The ends ot the key may be euttangentially, if desired, or in the line of asuitable curve, so that thekey may be made to iill the entire space in the tire-groove between theside pieces, or the ring maybe put in in segments, if desired. rl`heabove is the simpler and the preferred met-hed of building up the ringwithin the groove ol' the tire, but there are other methods.

The tangential lines in Fig. 2 indicate how in each set oi' sectionsforming onethird of a ring there may bc one piece cut tangentially atboth ends, and the adjoining pieces may be correspondinglyT cut at oneend to enable the ring to be readily built up. lach plate or third ofthe ring may be composed ot' two or more segmental pieces, as may bedesired, and the ring may be built up in place in the way suggested, orotherwise, as preferred. rlhc hub having been properly bored and turned,or otherwise made true, and the bolt-holes drilled, the hub is nextcentered with the tire, and the side plates having been formed ot' theproper size with bolt-holes corresponding to those in the ring and hub,they are forced by hydraulic pressure or otherwise into place, so as tobear by their inner edges and outer bearing-surfaces iirmlyagainst thetire and hub, as illustrated. Their flanged rims l'orm a more extendedbearing-surface for the tire than would their edges alone, and with theform of their central portion give them, in connection with the tire,the elasticity required in a car-wheel of the best type. Side plates ordisks of this eenstruction may also be used to advantage where theinternal ring or depending flange is intcgral with the tire. Finally,the plates are bolted to the ring and to the hub, which completes thewheel. r)She ring will hold all parts of the tire together in ease ofbreaking or cracking of a small piece or pieces ot the tire when thewheel is in. use, and thus serious accidents that sometimes happen fromsuoli causes will be averted.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

l. rlhe combination, with a tire l'or earwheel having a dovetail annulargroove in its inner face, of a sectional dovetail ring secured in suchgroove, substantially as setforth.

2. The combination, with a hub of a carwheel and its tire provided witha sectional dovetail ring, ol' side plates or disks pressed between thehub and tire and bolted to the hub and ring, substantially as set forth.

ln a car-wheel, the combination, with a hub and tire provided with asectional dovetail ring, of side plates or disks having flanged rims,and bolted to the hub and ring, substantially as set forth.

l. In a car-wheel, the combination, with a hub and a tire provided withan internal sectional dovetail ring, ol' side plates or disks with rimseurvin g outwardly from the depending flange, and bearing against thetire, and bolted tothe ring and hub, substantially as set forth.

In testimony whereol I have hereunto subscribed my naine this 15th dayot' August, A. D. 1883.

JOHN A. HAGAN. blitnesses:

SAM L. Xiii'rnsini-l, O. l?. Sro'rn.

